Improvement in hot-air furnaces



uma ggmpxgmg, WMMXQPQAMQ gg MR @YQ em Patented ct. 17,1871.

Umana amarres PATENT JAMES G. WELDON, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT lN HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 119,955, dated October 17, 1871.

To all whom it may concern.-

Be it known that I, JAMES G. WELDON, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain Improvements in Hot-Air Apparatus, of which the following is a specification: v

This invention relates to an improvement in that class of hot-air apparatus used for the artificial warming of buildings, wherein a current of air is made to pass through a series of tortuous Iiues or passage-ways, generallyvv stacked together over and around a furnace in a manner as to heat such air by contact on its way through them to the rooms or chambers above. My invention consists in the means I employ for gcneratin g steam and introducing it to the airpassages around the outside of the furnace, so that the ingoing currents of air shall take it up and become tempered and to a great degree rec- -ompensed for the loss of natural moisture, and by which the original vitality of the atmosphere is maintained 5 consequently better fitted for respiration.

Figure l represents a side elevation of a hotair apparatus, partly perspective and partly in sect-ion, with my steam-generating and supplying-contrivance attached. Fig. 2, view of the lower portion of a heating-apparatus, showing all of my improvements in vertical transverse section.

I construct a hot-air furnace with its several air-fines and passage-ways in any of the wellknown forms, and with all the usual appliances ai 1d appendages incident to such apparatus, but, in order to accomplish the object hereinbefore stated, I ,place on the outside of the furnace A and its casing B a small tank, C, provided with an automatic arrangement for regulating to it a supply of water, which arrangement consists in attaching to the cock of the feed-pipe n one end of a long lever, m, and toits other end a iloat,p, which rises and falls as the supply increases or diminishes, and by this means opens or closes the feed-pipe, as the case may require. To the bottom of this tank C I conneeta stand-pipe, l),- which 4passes downward and through the top of the air-supplying passage E, and then turns upward inside of the casin g B and unites with the head of a hollow arm, F, the small end of which extends through the walls T of the furnace A, and projects a short distance into the nre-pot,

so as to be acted upon by direct heat. Above this hollow arm F and connected thereto, and in communication with its interior, is arranged a steam-chamber, S, from the top of which extends a pipe, H, that is turned down in a vertical line to the air-passage E, and thence, by :a continuation of said pipe, horizontally along the interior of this air-passage a short distance where it terminates in a pipe, P, set at right angles thereto, which pipe is closed at its end, but perforated or pierced with numerous small holes along its sides, as shown in Fig. l. This apparatus, con structed as described, is intended to be placed in a cellar or lower apartment of the building to be warmed, and lines communicating with its outlet-passage R, carried to the various rooms. Such is the construction and relative position of parts that on a supply of water being let into the tank C it will flow down the stand-pipe D, and from thence'into the hollow arm F, so as to nearly fill it 5 when, on fire being placed in the furnace A, steam will soon be generated in the arm and pass up into the chamber S, and from this chamber be conducted by and through the curved pipe H and its horizontal continuation into the perforated small pipe P, and escape through the numerous minute openings therein into the air-duct E, where, by mingling with the iniiowin g current of outside air, it will be carried along upward and around the heating-surface ofthe furnace on its way to the rooms above, adding such a moderate, agreeable, and, at the same time, proper quantity of moisture to the air as is found requisite to produce a uniform as well as eicient and desired condition of the atmosphere.

I claim- Generating steam and introducing it into the air-passages of an air-heating apparatus by passing the water for the production of such steam into a hollow arm, F, so extending through the walls T ofthe furnace A and into the re-box as to be acted upon by direct heat, and conveying the steam so generated, by means of suitable pipes H, into the air-passages E, leading to and around the outside of said furnace in the manner shown and set forth.

J. Gr. WELDON.

JOHN KELLY. (154) @Het l 

